Lock construction



F. A. NEWHALL.

LOCK CONSTRUCTION. APPLICATION FILED DEC. Ia. I sIg.

1 35 1 1 1 7, Patented Aug. 31, 1920.

Tfg. l.

LOCK COlJSTRUCTDN.

Specification of Letters atent.

lfatented Aug'. 3l, 13220.

Application led November 13,1919. Serial lilo. 344,530.

To /IZZ folto/.u t may concer/1t:

lle it known that l, lfiunmnion A.. Nnwirim., a citizen ot the llnitodStates, and residing; at New York, in the county of New "fork and Stateoi New -ifork, have invented certain new and useful lniprovements inLoek Constructions, of which the followingv ,is a. specification, suchas will enable those skilled in the art to which it appertains to makeand use the same.

This invention relate to lock construeT tions and particularly todevices oli' this class designed lor use in locking doors or yothersu.'iiieiiiig` or moving members; and the object ot the invention is teprovide a supplemental lock member which cooperates with the locki'isualiy emgloyed and is operated thereby; a further object boing, toprovide a supplemental lock which .is constructed ot comparativelystrong;- mate 'ial and `which ro perates with the lock usually employedto pi ent the forcing et the door or other member in connection withwhich the lock mechanism is employed; and with these and other objectsin view the invention consiste in a lock construction of the classspecilied which is simple in construction and operation and ellieient inuse and constructed as eiuaii'fter described and claimed.

rThe invention is ttully disclosed in the iollowii" Asp1-mitication, otwhich the accompanyii'ig` dra wine' forms a part, in which the separateparts ot my improvement are designated by suitable reference charactersin eac i oi the rviews,'and in which 'lgure l is an inside view ot'apart of a loor and door trame and showing my imn prl ved loi-,kconstruction attached thereto;

fig. 2 a partial section on the line 2 2 of 1... l

3 a partial section on the line 3-3 of l? l.; and,

Fig. l a partial section on the line i-4: of

Fig'. 3, with parts in ay different position.

ln Figs. l and 2l have indicated at 5 a part olf a door trame and at 6 apart of a door which operates in connection therewith. ln l oi thedrawing, 7 represents the usual lock mechanism having a latch and lockbolt 8 operatedby a suitable key or a knob 9.

The above construction is old and forms no part of my invention, and inpractice, l employ in connection with the lock 7 a supplominitallooking` mechanism l0, comprising a striking plate 1l, which is ap-Yproximately et' angleiron form, one flange l2 et which is secured to thedoor trame by screws lfz and the other flange lll of which extends atright angles to the door traine.

The flange olf the striking plate ll is provided adjacent to the lowerend thereot` with a rectangular aperture l in connection with which thelatch and lock bolt 8 oi the lool; Y operates, as clearly illustrated inFig. 2 The top portion ol the striking plate ll provided with a:forwardly projectingT yokeeshaped bearing` 1G composed ot top andbottom members l? and i8. rlhe member 18 is provided with a downwardlydi ected slc ve bearing` i9, the lower end portion oit' wl ch is slottedon opoosite sides as shown at 20 in Fig. 4l. il. bolt 2l is movablymounted in the sleeve 19 and is adapted to pass through the bearing lG,er an aperture 22 in the top member ll" ot' said bearing as clearlyillustrated in Fig. f5 of the drawing.

l also secure to the door 6, above the lock 7, a plate 23 having aninwardly and out- Virdly directed. `rectangular head 24: pro ed with anaperture 25, and the head 2d er the plate 23 is adapted to pass into thebei'iring.;v i6 between the top and bottom mem.n

"Tf lltle f "e le l ili' i. anc. i .ioieo as clear y siown in mgs. l to3 inclusive, and the bolt 2l 1s adapted to pass through the aperture 25and the head 24:.

flange let thereo; as shown at 26 is a cam device 27 having acomparatively wide back plate 28. The cam device 27 is adapted to moveupwardly anddownwardly in the slots 2O in the sleeve Vi9 and to move thebolt 2l upwardly in said sleeve. The cam devi ce 27 and .bolt 2lnormally drop into their inoper ative position as shown in Fig. 4 byYgravity, in which position it will be seen that the back plate 28 'ofthe cam device 27 closes, or partially closes.J the aperture l5 in theflange le of the striking plate whereby when the bolt 8 passes throughthe aperture l5, by releasing the knob 9, or in the operation of closingthe door, the cam'devioe 27 will be moved inwardly and upwardly into theposition shown in' Figsjl; and 3, and the bolt 2l correspondingly movedupwardly from mivoted to the striking plate ll, or the lil() theposition shown in lifr. Ll to that shown in Y Fig. 3. ln this lastoperation it will also be apparent that the bolt 2l passes through theaperture 25 in the head of the plate 23 and the door 6 will be locked inconnection with the door frame 5 or the striking the lock .7, or bymanipulating the knob9 tok withdraw the bolt 8, which operation permitsthe cam device 2T and bolt Q1 to drop by gravity and-the door may beopened.

It will be apparent that my improved lock construction will moresecurely lock the door 6 in connection with ythe door frame and willprevent, or materially complicate the breaking in of the door by the useof jimmies 'or other implements, and by constructing the plate 225 aswell as the head 24 thereof and the bolt 2l and striking plate llcomparatively hard metal, the forcing of the door by a jimmy or otherimplement will almost be impossible without breaking away part of thedoor frame. By reason of the fact that the latch and lock bolt 8 isconstructed of comparatively soft metal, the door is readi ly opened byforce, in which operation the latch and lock bolt 8 bends or gives butby employing my improvedv supplemental lock in connection with the lockT, the forcing or breaking in of the door is materially complicated, ifnot entirely obviated. lt will be apparent that while I have showncertain details of construction for carrying my invention into effectthat l am not necessaril limited to these details and changes thereinand modifications thereof maybe made, withinV the scope of the appendedclaims, without departing` from the spirit of my invention orsacrificing its advantages.

Having fully described my invention, what l claim as new and desire tosecure by Letters Patent, is

l. The combination with a lock, of a supplemental lock comprising astriking plate secured to a stationarysupport, an apertured lock elementmovable into and out of engagement with said' striking plate, a lock.boltmovably mounted in the striking plate and adapted inone Vpositionthereof to pass through said lock element to secure in en- ,gagenient'with said striking plate, means operated by the latch bolt of the firstnamed lock for moving said lock bolt into its operative position, `andmeans whereby the withdrawal ofl said latch bolt will permit said tionof the striking Vplate being provided with a recess, a lock elementsecured to the door and adapted to operate in connection with the recessin said striking plate, a lock bolt mounted in and movable vertically inthe striking plate and adapted to pass through the recess therein andthrough the lockV element when in said recess, and a cam device pivotcdto the striking plate in juX- taposition to that part thereof with whichthe latch and lock bolt operates, the cam member of said cam devicebeing independent of and adapted to Voperate in connection with saidlock bolt to move the same into operativek position by said latchand'lock boltY in the operation of closing the door.

3. A door lock construction of the class described comprising anapproximately L- shaped striking plate adapted to be secured tothe doorframe and provided'at one end portion thei'eof vwith. va pair of memberswhich extend at right angles to said striking plate and which formbetween the same arecess, the other end portion of the striking plate orone side thereof being provided with an aperture, a cam device pivotedto the striking plate adjacent to said aperture, one of the members insaid pair being provided with a downwardly directed sleeve slotted toreceive the cam member of said cam device a bolt mounted to movevertically in said sleeve and through said pair of members, saidbolt'being moved into operative position by the cam member of said camdevice, and-a lock element'secured to the door and adapted to operate inthe recess between the members of said striking plate and Vinconnectionwith which said bolt is adapted to operate. Y

t. A combination with a lock of a supplemental lock comprising astriking plate secured to a stationary support, an apertured' lockelement movable into and out of engagement with said striking plate', alock bolt movably mounted in the striking plate and adaptedl in Voneposition thereof te pass through said lock element to secure the sameinengagement withsaid striking plate, and

means independent of said lock boltv and operated by the latch bolt ofythe' firstnamed lock for moving said lock bolt into its oper-v ativeposition.

`ln testimony that I claim the foregoingV '9th day of December, 1919.

FREDERICK A. NEl/VHALL. Witnesses: g

C. E. il/IULREANY, 'H. E. THOMPSON.

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